Well leakage identification equipment and method based on distributed optical fiber sensing

The invention belongs to the technical field of well drilling, particularly relates to well leakage identification equipment and method based on distributed optical fiber sensing in the well drilling process, and aims to solve the problems that the position of a drilling fluid leakage point cannot be accurately judged by a traditional testing method and the leakage position is difficult to identify under the condition of multiple leakage. The invention provides well leakage identification equipment based on distributed optical fiber sensing, which comprises a high-temperature-resistant and high-sensitivity multi-mode optical fiber and a high-temperature-resistant and high-sensitivity single-mode optical fiber which are arranged at an open hole section, and an armored optical cable is armored outside the single-mode optical fiber and the multi-mode optical fiber; the uDAS/DTS demodulator is arranged at a wellhead and used for receiving and processing measurement signals, the uDAS end of the demodulator is a si